I Just Can't Stop Loving You by Michael Jackson feat. Siedah Garrett is featured in Michael, the eleventh episode of Season Three. It is sung by Finn and Rachel.

When Kurt asks the New Directions to go to the auditorium to see what he has prepared, Finn holds Rachel back. The song is sung after their short conversation about Finn's proposal to Rachel. At the end of the duet, Rachel accepts his proposal and they share a kiss. At the end of the song, they both leave the choir room to join the rest of the New Directions in the auditorium.